#include <iostream>
using namespace std;
int main() {
    long long p, k; cin >> p >> k;
    const int M = 1000000007;
    long long mp = M * p;
    long long pw = 1;
    for (int i = 0; i < p-1; i++) pw = pw * 10 % mp;
    pw -= k;
    if (pw < 0) pw += mp;
    cout << (1 + pw / p) % M << endl;
}